Scraper



Jan. 8, 1929.

P. J. M NAMARA SCRAPER Filed June 14, 1927 3 Sheets-Sheet l WlPIWW c 1 EN .WN

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P. J. McNAMARA SCRAPER Filed June 14, 1927 3 Sheets-Sheet 2 IN VEN TOR.

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P. J. M NAMARA- SCRAPER Filed June 14, 1927 5 sheets-sheet 3 (g I Hioxowq B/Mdwmm Patented Jan. 8, i929,

PATRICK J. MCNAMARA, 0F BOWMAN, NORTH DAKOTA, AssreNoR aroma-HALF TO.

THEODORE B. TORKELSON, 01E BOWMAN,'NORTH DAKOTA.

SCRAPER. 1

Application and June 14, 1927. serial No. 198,312.

This invention relates to scrapers and more particularly to the construction of a hitch for scrapers in such manner that dumping and loading of the scraper and driving of the draft animals may all be attended to by a single person.

An important object'of the invention is to produce a device of this character, in which means are provided whereby the dumping operation may be performed by the team and whereby the point of application of strain from the team to the bucket is changed during the dumping operation, so that the .major portion of the strain ordinarily applied at this time is eliminated.

A further object of the invention is to provide a construction of this character such that the bucket may be released for the dumping operation by a twitch upon a control line carried in the hand'of the driver of the team. A further object of the invention is to provide a construction such that when the dumping operation is completed, the point at which the pull upon the bucket is inserted is again shifted, so that it is adjacent the lower end of the bucket while in dumping position, so that the weight of the bucket servesto assist in the spreading operation.

These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a plan view of a Fresno bucket equipped with a hitch constructed in accordance with my invention; 7

Figure 2 is a section on the line 22 of,

Figure l with the bucket in the load transporting position, the bucket being shown in loading position in dotted lines;

Figure 3 is a section similar to that shown in Figure 2, but with the bucket in the dumped position Figure 4 is a section on the line H of Figure 1, portions being broken away to show the interior construction;

Figure 5 is a section on the line 5 5 of Figure 4; I

Figure 6 is a front elevation of the control element.

Referring now more particularly to the drawings, the numeral 10 generally designates a Fresno bucket and 11 dumping runners secured to the sides 12 of the bucket and supporting the same in spaced relation to the ground during the dumping operation. In accordance with my invention, I secure to each side wall 12 adjacent the lower portion of the forward edge thereof a pivot 13 upon which is mounted a forwardly directed arm 14., the forward'end of which is up-:-

wardly and forwardly curved, as at 15. The outer end of each thereto a stop 16.

The numeral 17 generally designates abeam resting uponthe" arm 14 and having 'mitting the draft to this portion of the bucket instead of at the pivots 13 under certain circumstances. These flexible elements 21 are taut both when the bucket is in itsis in its dumping position. v

Likewise mounted upon each pivot 13. is a link 22, the outerrends of which are each connected with an arm 23 rigidly secured to transporting position and when the bucket and extending upwardly from the beam 17 Secured to the arm 14 is a rigidla'tch element 24 having a rearwardly facing shoulder 25 adapted to be engaged by the angular rear end portion 26 of pivoted latch ele ments 27' carried by the beam.

It will be obvious that when the latch elements 27 and 24 are engaged, the beam will be held against movement upon thearms l4 and accordingly the strain of draft applied thereto will be applied at the pivot 13, so that the bucket will tend at all times to remain in transporting position. If the bucket is shifted to the loading position, indicated in dotted lines'in F igure2, strain is taken from theflexible element 21 since the back of the bucket will approach the beam and the edge of the bucket is thrown into engagement with the ground, so that the drag is below the pivot point 13 and the tendency of the upper end of the bucket is always to move forwardly. This is,however, prevented by engagement of the runners 11 against the arm 14: has secured permitting the beams beam 17 at tliis'time. If it is desired that the bucket' be dumped, the latch elements 27 are disengaged from the latch elements 2%, 17 to move outwardly upon the arms 14. During this outward movement, the chains'21 again become taut,

transferring the strain to the upper end of the bucket, so that further separation of the beam from the rear end of the bucket 'is prevented-.. At this time, the arms 14: swing 'ments 27, I mount upon the beam at the cen ter thereofan axle structure comprising a pair of bracket'elements 28, opposed faces} of which are provided with circular abutments29, which combine in the assembled relation of the brackets to produce the axle. These abutments are provided with longitudinally extending slots 30, within which bars 31 are slidable. Surrounding the axle is a sleeve 32,'wliich is rotatable thereon and which has oppositely angling. slots 33 into which extend pins iii-carried by the bars 31. The outer ends of the bars 31 are connected, as at 35, with the latch elements 27. It will be obvious that as the sleeve 32 is rotated in one direction, the adjacent ends of the bars 31 will approach one another and the latch elements 27 will .be withdrawn from engagement with the shoulders 25. Then the sleeve is rotated in the opposite direction, the latch elements 27 are moved for engagement with the shoulders 25. Movement of the sleeve-in the last named direction is automatic, by' reason of a counterweight 36 appliedto the handle thereof, and movement of the sleeve in the first named direction may be accomplished by a flexible element 37 connected to an arm 39 formed on the sleeve. The ends'of the slots 33 are preferably provided with short circumferentially directed coves in which the pins 34 may seat when the sleeve is at either limit of its rotation so that the latch elements will be locked. against movement.

It will be obvious from the foregoing that by use of a hitch constructed in accordance with my invention, the bucket may be controlled by a single person in all of its operations. It will also be obvious that the construction hereinbefore set forth is capable of a certain range of change and modification Without materially departing from the spirit of the i nventionand I accordingly do not limit myself to such specific structure except as hereinafter claimed;

I claim 1. In combination with a scraper bucket having the usual side walls, an arm pivoted to each side wall at the forward edge thereof and adjacentthe bottom of the bucket, said arms being parallel, a transversely extending beam slidably engaged with said arms adjacent its ends, a flexibleelement connecting said be'amand: the upper edge of the bucket adjacent the rear end thereof, coacting. latch elements carried by the beam and said arms and normally engaged with one another, operator controlled means for releasing said latches and means for connecting the beam to the draft. I v

2in combination with a scraper bucket having the usual side walls, an arm pivoted. to each side wall at the forward edge thereof and adj accnt the bottom of the bucket, a beam slidably engagedwith said arms, a flexible element connecting said beam and the upper edge of the bucket adjacent the rear end thereof, coacting latch elements carried by the'beam and said arms and'nor; mally engaged with one another, operator, controlled means for releasing said latches andmeans for connecting the beam to .the draft, a, linkpivotally connected with the pivot of each arm a'nd armsprojecting from the beam and towhich theoppositeends of the links are connected and a member car.- ried by thenbu'cket.withwhich said links on gage to limit movement of the bucket to dumping position. v j I v3. In combination with a;scraper bucket having the usual side walls, an arm" pivoted to each side wall at the forward edge thereof and adjacent the bottom of thebucket, a beamslidably engaged with said arn'is, a flexible element connecting said beam and the upper edgeof. the bucket adjacent the rear end thereof, coacting latch elements carried by the beam ands'aid arms and normally engaged with one another, operator controlled means for releasin said latches, including a rotatable sleeve, operative connections between the sleeve jand latches whereby upon rotation ofthe sleeve in one direction the 'latches are moved. to release the same and upon rotation of the sleeve in the opposite -direction, the latches are shifted to' latching position, means constantly flexible element connecting said beam and the upper edge of the bucket adjacent the rear end thereof, coacting latch elements carried by the beam and said arms and normally engaged with one another, operator controlled means for releasing said' latches including an axle having keyways, bars slid able in said keyways, a sleeve having oppositely angled slots surrounding the axle and tending to rotate thesleeve in the last named bars, pins upon the bars extending into said slots, a connection between each bar and the corresponding latch, means constantly tending to rotate the sleeve in the direction such that the pin and slot engagement of the sleeves and bars move the bars from one another, means under the control of the operator for rotating the sleeve in the opposite direction and means for connecting the beam to the draft.

5. In combination with a scraper bucket having the usual side walls, an arm pivoted to each side wall at theforward edge thereof and adjacent the bottom of the bucket, a beam slidably engaged with said arms, a flexible element connecting said beam and the upper edge of the bucket adjacent the rear end thereof, coact-ing latch elements carried by the beam and said arms and normally engaged with one another, operator controlled means for releasing said latches, means for connecting the beam to the draft, and dumping runners carried by said bucket and during engagement of said latch elements engaging the beam to limit tilting of the bucket' when the bucket arrives at loading position.

6. In combination with a scraper bucket having the usual side walls, an arm pivoted to each side wall at the forward edge thereof and adjacent the bottom of the bucket, a beam slidably engaged with said arms, a flexible element connecting said beam and the upper edge of the bucket adjacent the rear end thereof, coacting latch elements carried by the beam and said arms and normally engaged with one another, operator conmoves to the dumping trolled means for-releasing said latches,

means for connecting the beam to the draft,

dumping runners carried by said bucket and during engagement of said latch elements engaging the beam to limit tilting of the; bucket when the bucket arrives at load ng position, a cross bar connecting sald runners and means connecting the bucket and said beam and engaging said bar to limit movement thereof to the dumping position.

In combination with a scraper bucket having the usual slde walls, an arm pivoted to each side wall at the forward edge thereof and adjacent the bottom of the bucket, a beam slidably engaged with said arms, a flexible element connecting said beam and, the upper edge of the bucket adjacent the rear end thereof, coacting latch elements carried by the beam and said arms and normally engaged with one another, operator controlled means for releasing said latches, means for connecting the beam to the draft, dumping runners carried by said bucket and during engagement of said latch element-s engaging the beam to limit tilting of the bucket when the bucket arrives at; loading position, abar connecting said runners, arms rigidly secured to said beam and links pivotally connected at their upper ends to the upper ends of said arms and at their lower ends to the bucket, said links as the bucket position engaging said bar to limit the movement of the bucket.

In testimony whereof I hereunto aifix my signature.

PATRICK J. MQNAMARA. 

